How to Disable Secure Boot

Secure Boot is a feature in Windows 8 and 10 that helps prevent malicious software
applications and unauthorized operating systems from loading during the
system start up process. While it is a great security feature, it effectively
prevents you from dual booting your PC. Any other Operating System without the
proper key will be deemed as unauthorized and will not be able to boot up.

What this means is that you can not dual boot Linux.

The intention of Secure Boot is not to lock out other operating systems.
This is just an unintended consequence of the feature. The purpose of UEFI is to
check for stuff that might make a computer behave unfavourably, like low level
malware that could sit between the hardware and operating system.

UEFI stands for Unified Extensible Firmware Interface.

If you want to boot a Linux Operating System like Ubuntu from a USB memory
stick or a CD/DVD then you first must disable Secure Boot in your BIOS.

When you first turn on your computer you must press the Del key or the F2
key to enter the BIOS Settings. Each computer is different and there is
usually a note on the start up screen that tells you which key to press. This must be done before Windows loads.

Each BIOS configuration utility is different. You will have to intuitively
navigate through the interface.

Try to find a menu labelled Security or Security Settings. Once you
navigate to it, head straight down to Secure boot configuration. There is a
possibility that you might have a Secure boot option right when you arrive at
the Security menu, so look out for that also. Once you see a Secure boot
option, disable it and restart by pressing F10. This is often the magic key that
saves your settings and restarts the computer.

You might not even find a secure boot option anywhere. You might not even
find an option under Security. The below image shows the option as UEFI Boot
under the Boot menu. Keep your eyes peeled for anything containing the words
Secure boot and UEFI.

On one laptop, I found TWO settings that had to be changed. Under the
Security Heading I had to turn Secure Boot off and then under the Boot Setting I
had to disable UEFI Boot.